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Catechol electrografting by one-pot/three-step electrochemical reduction of 3,4-dihydroxybenzenediazonium salts in situ generated from 4-nitrocatechol. Top: Schematic of the reaction. Bottom: Cyclic voltammograms (2 cycles) recorded at 50 mV s–1 at a bare glassy carbon electrode in 1 mM 4-nitrocatechol + 3 mM NaNO2 with 0.1 M HCl as aqueous electrolyte under inert atmosphere (Ar).
